Fitness Minutes: (136,735)
8/19/14 5:53 P
that's normal, as back extensions involve the abs as a supporting muscle.
Fitness Minutes: (8,215)
1,014 8/19/14 5:47 P
I love Coach Nicole's 15 minute workout. When I lie on the ball and lift my legs to do the back strengthening exercise, I feel like I can feel something in my tummy. Does anyone else have this experience?
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